Acquisitions and Discontinued Operations (Summary of Carrying Amount of Major Classes of Assets and Liabilities Related to EMEA and Pacific Rim Businesses) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Total current assets discontinued operations	$ 306.1	$ 125.2
Total non-current assets of discontinued operations		221.1
Total assets	1,873.5	1,758.0
Current liabilities:
Total current liabilities	128.5	80.8
Total non-current liabilities of discontinued operations		34.0
EMEA and Pacific Rim Business [Member]
Current assets:
Accounts and notes receivable, net	61.4	49.5
Inventories, net	59.2	62.1
Income tax receivable	3.1	4.0
Other current assets	12.9	9.6
Total current assets discontinued operations	136.6	125.2
Property, plant, and equipment, less accumulated depreciation and amortization	131.3	204.4
Prepaid pension costs	26.1	7.9
Goodwill and intangible assets, net	7.2	6.8
Deferred income taxes	4.0	1.0
Other non-current assets	0.9	1.0
Total non-current assets of discontinued operations	169.5	221.1
Total assets	306.1	346.3
Current liabilities:
Accounts payable and accrued expenses	78.6	80.1
Income tax payable	1.3	0.7
Total current liabilities	79.9	80.8
Pension benefit liabilities	34.7	29.5
Other long-term liabilities	1.8	2.1
Deferred income taxes	12.1	2.4
Total non-current liabilities of discontinued operations	48.6	34.0
Total liabilities of discontinued operations	$ 128.5	$ 114.8